### Flashbots Relay Signature Error

[KUMAOKI]

I am encountering a signature verification error while trying to send a bundle to the Flashbots relay on the Sepolia testnet. Below are the details of my setup and the error message:

• Ethereum Node: Infura Sepolia Testnet
• Priority Gas Price: 31000000000 wei
• Latest Block Number: 6221012
• Base Fee Per Gas: 2306378913

Transactions

1. From Rescue Wallet to Hacked Wallet:

   
   {
   "to": "0x[HACKED_WALLET_ADDRESS]",
   "value": 10000000000000000,
   "gas": 21000,
   "maxFeePerGas": 33306378913,
   "maxPriorityFeePerGas": 31000000000,
   "nonce": 0,
   "chainId": 11155111
   }

2. From Hacked Wallet to Rescue Wallet: { "to": "0x[RESCUE_WALLET_ADDRESS]", "value": 10000000000000000, "gas": 21000, "maxFeePerGas": 33306378913, "maxPriorityFeePerGas": 31000000000, "nonce": 0, "chainId": 11155111 }

Signed Transactions

Signed Transaction 1: 0x02f87683...15f817c89e
Signed Transaction 2: 0x02f87683...8eb0624297

Error Message { "error": "error in signature check" }

Payload and Headers

Payload:

{ "jsonrpc": "2.0", "method": "eth_sendBundle", "params": [ [ { "signed_transaction": "0x[signed_transaction_1]" }, { "signed_transaction": "0x[signed_transaction_2]" } ] ], "id": 1 } Headers:

{ "Content-Type": "application/json", "X-Flashbots-Signature": "0x[RELAY_SIGNING_ADDRESS]:0x[signature]" }

Could you please assist in identifying the cause of this error and how to resolve it? Any guidance would be greatly appreciated.

Thank you.